Video on demand (display) (VOD) are systems which allow users to select and watch/listen to video or audio content such as movies and TV shows when they choose to, rather than having to watch at a specific broadcast time, which was the prevalent approach with over-the-air broadcasting during much of the 20th century.
Simple machines are used to make work easier. They are used in various places and times in our lives. They include: the pulley, screw, wheel and axle, wedge, lever, and the inclined plane. Compound machines are made up of two or more simple machines. Materials Activity 1: Discovering Simple Machines Parents bring simple machines that they will demonstrate for students such as pliers, hammers, screwdrivers, wrenches, wire cutters, small crowbars, scissors, saws, garden tools,
There are fundamentally three basic machines â the lever, the inclined plane and. the wheel and axle. We sometimes refer to other combinations as simple. machines, and these appear somewhat more complicated but in reality are combi-. nations of the three basics.